Sermo

Sermo is a Latin noun meaning speech, discourse, or conversation. In classical Latin, it covers informal talk as well as formal oratory, and the term is a linguistic root in several Romance languages. The English word sermon derives from medieval Latin sermonem, reflecting its association with preaching.

Sermo also refers to a modern online platform for medical professionals. Sermo, Inc. operates a physician-only social networking platform that enables doctors to discuss clinical cases, seek peer opinions, and participate in surveys. Access is restricted to licensed physicians and other verified clinicians in supported regions. The service emphasizes confidentiality and professional discourse, offering features such as private discussion rooms, case threads, and de-identified discussions intended to protect patient privacy. Sermo has been described as an early example of the professional social web in healthcare and has been used to gauge treatment patterns, gather expert input, and inform market research. Critics have raised concerns about patient privacy and the potential for identifiable case details, prompting ongoing attention to data protection and governance. Sermo’s influence on medical communication contributed to broader discussions about physician engagement online and the role of online communities in continuing medical education and research.

It should not be confused with sermon as a religious address, illustrating the word's shared root in speech and discourse.